Mold for concrete blocks



' M. KILLITS.

MOLD FOR CONCRETE BLOCKS. APPLICATION FILED mm. 1919.

Patnted Sept. 20,1921.

PATENTOFFICE.

MORRIS J. KIrLrrs, or CoLUMBUs, OHIO,

nssroivon 'ro THE 1. STONE COMPANY,

or OLUMBUS, OHIO, A CORPORATION or OHIO.

MOLD roe CONCRETE ianooxs.

Application filed April 2,

TodZZ whom it may concern:

Be it known that I, Mourns J. Krnm'rs, a citizen of the United States,residing at C0- lumbus, in the county of Franklin and State of Ohio,have invented a certain new and useful Improvement in Molds for ConcreteBlocks, of which the following is a specification.

The object of this invention is to provide a mold made of separableparts which shall be strong and durable yet light in weight andeconomically manufactured. To this end I construct the parts of the moldof sheet metal, bending and cutting the same to form thecores, suchcores in connection with other details aflording a firm connec tion'between the parts when they are aS- sembled to form the mold.

' The invention is embodied in the example herein shown and described,the features of novelty being finally claimed.

In the accompanying drawing Figure 1 is a top plan view of the mold, theparts being assembled in working position.

Fig. 2 is a vertical section on the line 11-11 Fig. 1. Y

Fig. 3 is a vertical section on the line IIIIII Fig. 1.

The end members 5 are sheets of metal bent to form hollow cores 6,vertical upwardly extending flanges 7 and vertical downwardly extendingflanges 8. The end members are braced by horizontal angle irons 9 andvertical angle irons 10 bridging the cavities of the cores 6, said anglebars being spot welded to the end members. The ends of the cores 6 arebeveled sufficiently as seen at 6 to receive snugly the cores of thesides as hereinafter described.

The sides are formed of sheets of metal bent to form hollow cores 11,verticalyupwardly extending flanges 12, downwardly extending verticalflanges 13 having inwardly extending horizontal lips 14. The cores 11are not beveled at their ends and are at said ends inserted into thehollow beveled ends of the cores 6 as best seen in Fig. 1.

The sides have each secured to them at each corner one web of an angleiron 15 the other web of the angle iron removably embracing the adjacentend of the end member. Said side members also have horizontal bracingangle irons 16 welded to them.

These molds are capable of indefinite mul- Specification of LettersPatent.

Patented Sept. 20, 1921.

1919. Serial No. 286,866.

tiplication transversely of the mold cavities and for this reason Idenominate the members shown at the top and bottom of Fig. 1 as ends.For example the sides may be formed of such length "and to provide adozen or more of the molding cavities.

The intermediate section is formed of sheet metal with two hollow coresextending in-opposite directions as at 17 and 17 and having upwardly anddownwardly extending flanges 18 and 19 respectively, said flanges beingbent one upon the other to secure the parts together. The ends of thehollow cores 17 and 17 are beveled as at 17 b and 17 to receive thehollow cores 11 of the side members. The upper vertical flanges of thesides are notched at 20 to receive short extensions 18 of the flange 1821 designates bottom pieces or parts for the mold cavities. These bottompieces consist of rectangular sheets provided at the lower sides withlongitudinally extending angle bars 22 spot welded to the plates, saidbars bracing the plates. When in place the bottom pieces rest removablyon the horizontal lips 14.

After the parts thus Constructed are assembled as shown-they are boundtogether by bowed spring clamping bars23, the bent ends of which engagethe sides at the angle bars 15 and are held in place by the resilienceof the bowed spring. When so bound together the structure can be movedabout and subjected to a good deal of rough handling without comingapart.

It will be observed that the form in which the hollow cores are madeaffords large lapping or engaging surfaces between the members at thejoints and thus gives great rigidity to the structure when assembled andnotwithstanding the thin character of the material used. I

The forms of the parts can be changed to some extent Without departingfrom the gist of the invention as claimed.

What I claim is:

1. A mold forconcrete blocks, comprising, in combination, separablesides and ends of sheet metal bent to form hollow cores, the cores ofthe ends having beveled ends to engage the cores of the sides and anintermediate core member having beveled ends to engage the cores of thesides and bowed spring clamping bars beyond the ends to hold the sidesengaged with the ends.

2. A mold for concrete blocks, Comprising,

in combination, side and end members of sheet metal bent to form hollowcores, the cores of the ends having beveled ends to engage'the cores ofthe sides, an intermediate double hollow core of sheet metal having itsopposite ends beveled to engage the cores of the sides, angular cornerpieces on the sides to embrace the ends, and bowed spring clamping barsbeyond the ends to hold the sides to the ends. 7

3. A mold for concrete blocks, comprising, in combination. side membersand end members of sheet metal bent to form hollow cores, the cores ofthe ends havin beveled ends to engage the cores of the sides, said sideshaving downwardly extending portions provided with inwardly turned lips,and a removable bottom reinforced: longitudinally at its edges withangle bars supported transversely on said lips.

' MORRIS J. KILLITS.

